Ceiling-block



(No Model.)

. A. EKSTROM.

CEILING BLOCK.

No. 462,349. Patented Nov. 8, 1891.

WITNESSES: INVENTOR:

Nt'rn terns PATENT OFFICE.

AXEL EKSTRCM, OF LYNN, MASSACHUSETTS, ASSIGNOR TO THE THOMSON- HOUSTONELECTRIC COMPANY, OF CONNECTICUT.

CEILING-BLOCK.

SPECIFICATION forming part of Letters Patent No. 462,349, dated November3, 1891.

Application filed May 29, 1891. Serial N0.394.5Z8. (N0 model.)

T0 aZZ whom it may concern.-

Be it known that I, AXEL EKsTRCiM, a citizen of the United States,residing at Lynn, in the county of Essex and State of Massachusetts,have invented certain new and useful Improvementsin Ceiling-Blocks, ofwhich the following is a specification.

This invention relates to ceiling or connec tion blocks; and its objectis to render the same compact, strong, and cheap in manufacture andrepair.

In the accompanying drawings the block is shown in an invertedposition,Figure 1 beinga plan, Fig. 2 a central section, and Fig. acorner elevation.

The insulating body or base A of the ceiling-block has an exterior orsurrounding rim or flange a of an undulating o'utlinethat is, each sidethereof presents alternate raised and depressed portions. A circularwall or flange (0' on the body a extends upwardly therefrom, and slots aare made in said wall and the base-plate to receive the jaws B forclamping the main wires C and the jaws B for the lamp-wires C. Thesejaws are placed on opposite sides of flange a and in the respectivehollows thereof. The main wires being led over the flange oron one sideand the lamp-wires led under or on the other side, they-are wellinsulated by the substance of the flange, while the arrangement of thejaws .in the hollows of the flange brings their clamping portions on alevel or nearly so, thus enabling the jaws to be made just alike, andalso considerably reducing the height of the block. Acap or cover 1),preferably of strong thin insulating material, such as a mica plate, isplaced over the block and'held in. place by a central split pin or key(Z, engaging in a central hole in the block, and provided with a knob orhandle (1' to permit ready removal. Fuses f f are inserted between themain and lamp wires, as usual, being fastened to clamps B. The mica cap,being both refractory and transparent, is not injured by blowingof afuse, and enables a blown fuse or bad connection to be readily detectedfrom below.

What I claim as new, and desire to secure by Letters Patent, is

1. A ceiling or connection block having a central body with asurrounding undulating fiangeand having clamping-jaws for the main andlamp wires on opposite sides of said flange and in the hollows thereof.

2. A ceiling or connection block having a base with a central hole and asurrounding flange or wall with fuses and connections in the spacebetween the hole and wall and a cap covering said space and providedwith a handle and with a fastening-pin entering said central hole andconsisting of a thin plate of refractory transparent insulatingmaterial, such as mica.

In witness whereof I have hereunto set my hand this 20th day of May,1891.

AXEL EKSTROM.

'Witnesses:

JOHN W. GIBBoNnY, BENJAMIN 13. HULL.

